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https://www.readbyqxmd.com/read/28340302/does-the-type-of-activity-break-from-prolonged-sitting-differentially-impact-on-post-prandial-blood-glucose-reductions-an-exploratory-analysis
#1
Robyn N Larsen, Paddy C Dempsey, Francis Dillon, Megan Grace, Bronwyn A Kingwell, Neville Owen, David W Dunstan
Frequent breaks in prolonged sitting are associated beneficially with glycaemic control. However, the contribution of energy expenditure to these relationships has not been well characterised. In this exploratory analysis, data from three laboratory trials that standardised test meals, cohort characteristics (overweight/obese, sedentary), and break frequency and duration were pooled. Higher energy expenditures of different types of breaks (standing, light- or moderate-intensity walking) were associated with lower post-prandial glucose and insulin responses in a dose-dependent manner...
March 24, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28339829/perceived-office-environments-and-occupational-physical-activity-in-office-based-workers
#2
A Sawyer, L Smith, M Ucci, R Jones, A Marmot, A Fisher
Background: Individuals in office-based occupations have low levels of physical activity but there is little research into the socio-ecological correlates of workplace activity. Aims: To identify factors contributing to office-based workers' perceptions of the office environment and explore cross-sectional relationships between these factors and occupational physical activity. Methods: Participants in the Active Buildings study reported perceptions of their office environment using the Movement at Work Survey...
March 1, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/28339397/cognitive-status-gray-matter-atrophy-and-lower-orthostatic-blood-pressure-in-older-adults
#3
Celia O'Hare, Rose-Anne Kenny, Howard Aizenstein, Robert Boudreau, Anne Newman, Lenore Launer, Suzanne Satterfield, Kristine Yaffe, Caterina Rosano
BACKGROUND: Associations between orthostatic blood pressure and cognitive status (CS) have been described with conflicting results. OBJECTIVE: We hypothesize that long-term exposure to lower orthostatic blood pressure is related to having worse CS later in life and that atrophy of regions involved in central regulation of autonomic function mediate these associations. METHODS: Three-to-four measures of orthostatic blood pressure were obtained from 1997-2003 in a longitudinal cohort of aging, and average systolic orthostatic blood pressure response (ASOBPR) was computed as % change in systolic blood pressure from sit-to-stand measured at one minute post stand...
March 20, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28330682/the-impact-of-posture-on-the-cardiac-depolarization-and-repolarization-phases-of-the-qt-interval-in-healthy-subjects
#4
Yurie Obata, Pavel Ruzankin, Qi Jia Ong, Dan E Berkowitz, Ronald D Berger, Jochen Steppan, Viachaslau Barodka
BACKGROUND: Postural changes affect both heart rate and the QT interval. OBJECTIVE: To investigate the effects of postural changes on the depolarization and repolarization phases of the QT interval. METHODS: A three lead ECG from 12 healthy young volunteers was recorded in the standing, sitting and in the supine positions. For the purpose of this study, we defined the depolarization phase as the QRS complex plus the ST segment and the repolarization phase as the duration of the T wave...
March 12, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28324960/design-and-characterization-of-a-torque-controllable-actuator-for-knee-assistance-during-sit-to-stand
#5
Max K Shepherd, Elliott J Rouse
Individuals with post-stroke hemiparesis often have difficulty standing out of a chair. One way to potentially improve sit-to-stand is to provide knee extension assistance using a powered knee exoskeleton. An exoskeleton providing unilateral, partial assistance during sit-to-stand would need to be torque-controllable. There are no knee exoskeletons on the market suitable for conducting experiments assisting stroke patients with sit-to-stand, so to enable such experiments a research device was developed. The purpose of this report is to present the design of a novel knee exoskeleton actuator that uses a fiberglass leaf spring in series to improve torque-controllability, and present a characterization of the actuator performance...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324754/effects-of-sit-to-stand-training-combined-with-transcutaneous-electrical-stimulation-on-spasticity-muscle-strength-and-balance-ability-in-patients-with-stroke-a-randomized-controlled-study
#6
Kyoung-Sim Jung, Tae-Sung In, Hwi-Young Cho
Sit-to-stand is a fundamental movement of human being for performing mobility and independent activity. However, Stroke people symptoms experience difficulty in conducting the sit-to-stand due to paralysis and especially ankle spasticity. Recently, transcutaneouselectrical- stimulation (TENS) is used to reduce pain but also to manage spasticity. The purpose of this study was to determine (1) whether TENS would lead to ankle spasticity reduction and (2) whether sit-to-stand training combined with TENS would improve spasticity, muscle strength and balance ability in stroke patients...
March 10, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28323585/feasibility-of-hypoxic-challenge-testing-in-children-and-adolescents-with-congenital-heart-and-lung-disease
#7
Mandy E Spoorenberg, Erik H J Hulzebos, Tim Takken
BACKGROUND: This is a cross-sectional observational study to investigate the safety and feasibility of integrating changing body positions and physical activity in a hypoxic challenge test (HCT). The secondary objective was to compare oxygen saturation (Spo2) in two different locations (forehead and finger). METHODS: Included were 12 pediatric to young adult patients with congenital heart (N = 7) or lung disease (N = 5). An HCT was performed using breathing room air (21% oxygen) while sitting and breathing a normobaric hypoxic gas mixture (15% oxygen) through a facemask while seated, lying supine, standing, walking 3 km/h, and walking 5 km/h in a nonrandomized order...
December 1, 2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28315666/feasibility-and-safety-of-a-powered-exoskeleton-for-assisted-walking-for-persons-with-multiple-sclerosis-a-single-group-preliminary-study
#8
Allan J Kozlowski, Michelle Fabian, Dipan Lad, Andrew Delgado
OBJECTIVE: To examine the feasibility, safety, and secondary benefit potential of exoskeleton-assisted walking with one device for persons with multiple sclerosis (MS) DESIGN: Single-group longitudinal preliminary study with 8-week baseline, 8-week intervention, and 4-week follow-up. SETTING: Outpatient MS clinic at tertiary care hospital. PARTICIPANTS: The 13 participants were mostly female who ranged in age from 38-62 years and on Expanded Disability Status Scale scores from 5...
March 15, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28306640/cervical-alignment-variations-in-different-postures-and-predictors-of-normal-cervical-kyphosis-a-new-understanding
#9
Hwee Weng Dennis Hey, Eugene Tze-Chun Lau, Chengyuan Gordon Wong, Kimberly-Anne Tan, Gabriel Ka-Po Liu, Hee-Kit Wong
STUDY DESIGN: Prospective comparative study OBJECTIVE.: To predict physiological alignment of the cervical spine and study its morphology in different postures. SUMMARY OF BACKGROUND DATA: There is increasing evidence that normal cervical spinal alignment may vary from lordosis to neutral to kyphosis, or form S-shaped or reverse S-shaped curves. METHODS: Standing, erect sitting and natural sitting whole spine radiographs were obtained from 26 consecutive patients without cervical spine pathology...
March 16, 2017: Spine
https://www.readbyqxmd.com/read/28303326/postural-and-cortical-responses-following-visual-occlusion-in-standing-and-sitting-tasks
#10
Kwang Leng Goh, Susan Morris, Wee Lih Lee, Alexander Ring, Tele Tan
Perturbation-evoked responses (PERs) to a physical perturbation of postural stability have been detected using electroencephalography (EEG). Components of these responses are hypothesized to demonstrate the detection (P1) and evaluation (N1) of postural instability. Despite the important contribution of the visual system to postural control, PERs to a visual perturbation of posture have yet to be reported. Ten healthy young adults were exposed to unpredictable visual occlusion mediated through liquid crystal glasses under two conditions of postural demand: quiet standing and quiet sitting...
March 16, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28301081/relationship-between-early-motor-milestones-and-severity-of-restricted-and-repetitive-behaviors-in-children-and-adolescents-with-autism-spectrum-disorder
#11
Mirko Uljarević, Darren Hedley, Gail A Alvares, Kandice J Varcin, Andrew J O Whitehouse
This study explored the relationships between the later age of achievement of early motor milestones, current motor atypicalities (toe walking), and the severity of restricted and repetitive behaviors (RRBs) in individuals with autism spectrum disorder (ASD). Parents of 147 children and adolescents with ASD (Mage  = 8.09 years, SD = 4.28; 119 males) completed an early developmental milestones questionnaire and the Social Responsiveness Scale as a measure of Insistence on Sameness (IS) and Repetitive Mannerisms (RM)...
March 16, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28298654/standing-orthostatic-blood-pressure-measurements-cannot-be-replaced-by-sitting-measurements
#12
Anna C Breeuwsma, Laura C Hartog, Adriaan M Kamper, Klaas H Groenier, Henk Jg Bilo, Nanne Kleefstra, Kornelis Jj Van Hateren
As many elderly patients are not able to stand for several minutes, sitting orthostatic blood pressure (BP) measurements are sometimes used as an alternative. We aimed to investigate the difference in BP response and orthostatic hypotension (OH) prevalence between the standard postural change to the sitting and the standing position in a cross-sectional observational study. BP was measured with a continuous BP measurement device during two postural changes, from supine to the sitting and from supine to the standing position...
March 16, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28296272/ergonomic-analysis-of-the-surgical-position-in-functional-endoscopic-sinus-surgery
#13
Vijay R Ramakrishnan, Benjamin M Milam
BACKGROUND: Ergonomics is the methodologic study of people's efficiency in their work environment and is based on anatomy, physiology, psychology, and engineering. Although highly studied in other work environments, little attention has been paid to surgeons until the landmark survey by Park et al in 2010. Many unique aspects of endoscopic surgery amplify task-related physical discomfort, and, because of these issues, we aimed to study the physical fatigue effects of functional endoscopic sinus surgery (FESS) performed in the standing and sitting positions...
March 15, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28293984/hip-prosthesis-in-sitting-posture-for-bilateral-transfemoral-amputee-after-burn-injury-a-case-report
#14
Yukiyo Shimizu, Hirotaka Mutsuzaki, Takayuki Maezawa, Yuji Idei, Kazuya Takao, Ryoko Takeuchi, Shinzo Onishi, Yasushi Hada, Masashi Yamazaki, Yasuyoshi Wadano
BACKGROUND: To overcome the challenges of rehabilitation of bilateral transfemoral amputees, we developed a novel "hip prosthesis in the sitting posture." Case Description and Methods: A 64-year-old male bilateral transfemoral amputee was transferred for rehabilitation 4 months following a burn injury. His wounds remained unhealed for 20 months; thus, he was unable to participate in standing training with the standard prosthetic sockets. Hip prosthesis in the sitting posture has very little friction between the sockets and residual limbs, which facilitated our patient to begin standing and walking exercises...
December 1, 2016: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28288227/-physical-activity-patterns-of-school-adolescents-validity-reliability-and-percentiles-proposal-for-their-evaluation
#15
Marco Cossío Bolaños, Jorge Méndez Cornejo, Cristian Luarte Rocha, Rodrigo Vargas Vitoria, Bernabé Canqui Flores, Rossana Gomez Campos
Regular physical activity (PA) during childhood and adolescence is important for the prevention of non-communicable diseases and their risk factors. OBJECTIVES: To validate a questionnaire for measuring patterns of PA, verify the reliability, comparing the levels of PA aligned with chronological and biological age, and to develop percentile curves to assess PA levels depending on biological maturation. SUBJECTS AND METHOD: Descriptive cross-sectional study was performed on a sample non-probabilistic quota of 3,176 Chilean adolescents (1685 males and 1491 females), with a mean age range from 10...
February 2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28288011/using-activity-monitors-to-measure-sit-to-stand-transitions-in-overweight-obese-youth
#16
Tarrah Mitchell, Kelsey Borner, Jonathan Finch, Jacqueline Kerr, Jordan Carlson
INTRODUCTION: Reducing sedentary behavior has emerged as an important health intervention strategy. Although hip-worn, and more recently wrist-worn, accelerometers are commonly used for measuring physical activity and sedentary behavior, they may not provide accurate measures of postural changes. The current study examined the validity of commonly used hip- and wrist-worn accelerometer cut points and the thigh-worn activPAL activity monitor for measuring sit-to-stand transitions as compared to direct observation in youth with overweight and obesity...
March 10, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28287428/an-experimental-study-of-the-effects-of-external-physiological-parameters-on-the-photoplethysmography-signals-in-the-context-of-local-blood-pressure-hydrostatic-pressure-changes
#17
Hongwei Yuan, Sven Poeggel, Thomas Newe, Elfed Lewis, Charusluk Viphavakit, Gabriel Leen
A comprehensive study of the effect of a wide range of controlled human subject motion on Photoplethysmographic signals is reported. The investigation includes testing of two separate groups of 5 and 18 subjects who were asked to undertake set exercises whilst simultaneously monitoring a wide range of physiological parameters including Breathing Rate, Heart Rate and Localised Blood Pressure using commercial clinical sensing systems. The unique finger mounted PPG probe equipped with miniature three axis accelerometers for undertaking this investigation was a purpose built in-house version which is designed to facilitate reproducible application to a wide range of human subjects and the study of motion...
March 10, 2017: Sensors
https://www.readbyqxmd.com/read/28285898/total-hip-arthroplasty-improves-pain-and-function-but-not-physical-activity
#18
Artaban J Jeldi, Angela H Deakin, David J Allen, Malcolm H Granat, Margaret Grant, Ben W Stansfield
BACKGROUND: People with hip osteoarthritis are likely to limit physical activity (PA) engagement due to pain and lack of function. Total hip arthroplasty (THA) reduces pain and improves function, potentially allowing increased PA. PA of THA patients was quantified to 12 months postoperation. The hypothesis was that postoperatively levels of PA would increase. METHODS: PA of 30 THA patients (67 ± 7 years) was objectively measured preoperatively and 3 and 12 months postoperation...
February 10, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28285311/postural-transitions-during-activities-of-daily-living-could-identify-frailty-status-application-of-wearable-technology-to-identify-frailty-during-unsupervised-condition
#19
Saman Parvaneh, Jane Mohler, Nima Toosizadeh, Gurtej Singh Grewal, Bijan Najafi
BACKGROUND: Impairment of physical function is a major indicator of frailty. Functional performance tests have been shown to be useful for identification of frailty in older adults. However, these tests are often not translatable into unsupervised and remote monitoring of frailty status at home and/or community settings. OBJECTIVE: In this study, we explored daily postural transition quantified using a chest-worn wearable technology to identify frailty in community-dwelling older adults...
March 11, 2017: Gerontology
https://www.readbyqxmd.com/read/28283135/on-the-2-row-rule-for-infectious-disease-transmission-on-aircraft
#20
Vicki Stover Hertzberg, Howard Weiss
BACKGROUND: With over two billion airline passengers annually, in-flight transmission of infectious diseases is an important global health concern. Many instances of in-flight transmission have been documented, but the relative influence of the many factors (see below) affecting in-flight transmission has not been quantified. Long-standing guidance by public health agencies is that the primary transmission risk associated with air travel for most respiratory infectious diseases is associated with sitting within two rows of an infectious passenger...
September 2016: Annals of Global Health
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